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1. 发明授权

US4119611A Process for the production of linear condensates of phenol and formaldehyde 失效
标题翻译：生产苯酚和甲醛线性缩合物的方法
公开(公告)号：US4119611A
公开(公告)日：1978-10-10
申请号：US845924
申请日：1977-10-27
申请人： Joachim Lobering
发明人： Joachim Lobering
IPC分类号： C08G8/10
CPC分类号： C08G8/10
摘要： A two-stage process for making a linear condensate of phenol and formaldehyde which can be extruded as a film or thread. In the first stage phenol and formaldehyde are reacted at about 90.degree. C to produce a clear low-viscosity phenol-methylol liquid, the pH of which is adjusted to a value greater than 3, say between 3.5 and 7. In the second stage the product of the first stage is added in aliquot portions to molten phenol having a pH of 3 or less, while maintaining the temperature at about 100.degree. C. After all the phenol-methylol has been added the mixture is slowly heated as the viscosity increases up to about 150.degree. C until there is no further increase in viscosity. The highly viscous end product can be extruded as a film or thread.
摘要翻译：用于制造苯酚和甲醛的线性缩合物的两阶段方法，其可以挤出为膜或线。在第一阶段中，苯酚和甲醛在约90℃下反应以产生澄清的低粘度苯酚 - 羟甲基液体，其pH值调节至大于3，例如3.5-7之间。在第二阶段，将第一阶段的产物以等份部分加入到pH为3或更低的熔融酚中，同时保持温度在约100℃。加入所有的酚 - 羟甲基后，随着粘度增加，将混合物缓慢加热至约150℃，直到粘度没有进一步增加。高粘度的最终产品可以挤出成膜或线。

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